First of convection on both sides of the insulating glass, and then pass it through the whole hollow glass, forming energy loss. Hollow glass reasonable design, can reduce the gas convection, thereby reducing convective energy loss. Conduction transfer conduction passing through the object molecular movement loe hollow glass, hollow glass driving energy of motion, and achieve the purpose of passing 12a hollow glass, like rice and wok electric soldering iron for things like insulating glass bar, while the hollow Glass on energy transfer is conduction through the glass and its internal air to complete. A heated glass should adopt multi-group pressure roller, gradually pressed to the required thickness. Each group should be parallel pressure roller to ensure uniform thickness pressed glass. 2 by the press at the exit strip temperature should be controlled at 40-55 ℃. Three composite tape insulating glass sealing using a three-step procedure that pressure, Po, pinch sealing operation completes final hollow glass. ① pressure: strip along the outside edge to another section of the vertical extrusion layering, to two strips until completely fused together;